 +_____________________________________________________________________
 ] AUTHOR:            ]                             ] DR:              ]
 ] R. W. MCALLISTER   ]    PASS PROGRAM NOTE        ]    45166         ]
 ]____________________]                             ]__________________]
 ] ORG/PHONE:         ] OPS NOTE ( )  USER NOTE (X) ] DATE: SEPT. 1989 ]
 ] ENG/282-8428       ]      RELEASE NOTE( )        ] REV A: JULY 1989 ]
 ]____________________]_____________________________]__________________]
 ] OI/FLIGHT EFFECTIVITY:        ]  USER AFFECTED:                     ]
 ] REL 19 AND SUBS               ]  CREW (X)  GROUND (X)  DUMP ONLY ( )]
 ]_______________________________]_____________________________________]
 ]        MAJOR SOFTWARE AREA:       ] OPS MODES AFFECTED:             ]
 ]SSW ( )  GNC (X)  VU ( )  SM/PL ( )] G1, G6, G2, G3, G8, G9          ]
 ]_____________________________________________________________________]
 ] SOFTWARE SUB-AREA:  IMU                                             ]
 ]_____________________________________________________________________]
 ] PRINCIPAL FUNCTIONS: V4.9A, 4.72, 4.38                              ]
 ]_____________________________________________________________________]
 ] TITLE:                                                              ]
 ] BITE TEST IGNORES IMU SELECTED AFTER FAILURE                        ]
 ]_____________________________________________________________________]
 ] DESCRIPTION:                                                        ]
 ] A. IN THE TWO-IMU'S-SELECTED-BY-RM CASE, IT IS POSSIBLE FOR THE     ]
 ]    VELOCITY UNDER LIMIT (VUL) TEST (IMU BITE PROCESSING) TO         ]
 ]    ANNUNCIATE AN IMU BITE/T MESSAGE FOR THE WRONG IMU.              ]
 ]                                                                     ]
 ]    IF A "GOOD" IMU CORRECTLY SENSES A NORMALIZED CHANGE OF VELOCITY ]
 ]    BELOW THE FAIL LIMIT (1.61 FT/SEC) AND THE "BAD" IMU SENSES A    ]
 ]    NORMALIZED CHANGE OF VELOCITY ABOVE THE ENABLE LIMIT (1.93 FT/   ]
 ]    SEC), AN IMU BITE/T MESSAGE WILL BE ANNUNCIATED FOR THE "GOOD"   ]
 ]    IMU BY IMU BITE PROCESSING. THIS CONDITION WILL EXIST AS LONG    ]
 ]    AS THE CHANGE OF VELOCITY REMAINS BELOW THE ENABLE LIMIT.        ]
 ] B. IN THE ABOVE CASE, IF THE THIRD IMU IS RESELECTED, IT WILL NOT   ]
 ]    BE INCLUDED IN THE VUL TEST AS LONG AS THE CHANGE IN VELOCITY    ]
 ]    REMAINS BELOW THE ENABLE LIMIT, I.E., VALIDITY OF AN IMU BITE/T  ]
 ]    ANNUNCIATION CANNOT BE RESOLVED BY RESELECTING THE THIRD IMU     ]
 ]    UNLESS THE VELOCITY ENABLE LIMIT IS EXCEEDED BY AT LEAST 2       ]
 ]    IMU'S.                                                           ]
 ]_____________________________________________________________________]
 ] USER RESPONSE: BE AWARE THAT,                                       ]
 ] A. THE VELOCITY UNDER LIMIT TEST MAY ANNUNCIATE AN IMU BITE/T       ]
 ]    MESSAGE OR THE WRONG IMU IN THE TWO-IMU'S SELECTED-BY-RM CASE.   ]
 ] B. RESELECTING THE THIRD IMU WILL NOT HELP TO RESOLVE DOUBT ABOUT   ]
 ]    A VELOCITY UNDER LIMIT UNTIL THE VELOCITY ENABLE LIMIT           ]
 ]    (1.93 FT/SEC PER) IS EXCEEDED. THIS CONDITION WILL CARRY OVER    ]
 ]    AN OPS TRANSITION BECAUSE THE ASSOCIATED FLAGS ARE RESIDENT      ]
 ]    IN THE MAJOR FUNCTION BASE.                                      ]
 ]_____________________________________________________________________]
 ]CONCURRENCE:                           ]APPROVAL:                    ]
 ]IBM: WYATT COOPER         DATE 09/06/89]                             ]
 ]    --------------------      ---------]                             ]
 ]SSD: SAM ANKNEY           DATE 09/11/89]                             ]
 ]    --------------------      ---------] M.C. GREMILLION    10/02/89 ]
 ]PF MGR:M.N. MONTEZ        DATE 09/21/89]------------------- -------- ]
 ]       -----------------      ---------] CHAIRMAN, SASCB      DATE   ]
 ]       J.R. THIBODEAU,III DATE 09/29/89]------------------- -------- ]
 ]       -----------------      ---------]                             ]
 ]_______________________________________]_____________________________]
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